<template>
  <el-container class="home-container">
    <!--头部布局-->
    <el-header>
      <div>
        <img src="@/assets/logo.jpg" alt class="logo_img"/>
        <span>后台管理系统</span>
      </div>
      <el-button type="info">安全退出</el-button>
    </el-header>
    <el-container>
      <!--侧边布局-->
      <!-- 伸缩 -->
      <el-aside :width="isCollapse ?'64px':'200px'">
        <!--伸缩按钮-->
        <div class="toggle-button" @click="toggleCollapase">|||</div>
        <!--侧边栏菜单区 unique-opened="true" 只保持一个菜单展开 router开启路由 active-text-color 颜色-->
        <!-- :default-active   用于保存默认路由 -->
        <el-menu background-color="#545c64" text-color="#fff" active-text-color="#409eff" unique-opened
                 :collapse="isCollapse"
                 :collapse-transition="false" :router="true" :default-active="activePath">
          <!-- 一级菜单-->
          <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
            <template slot="title">
              <i :class="iconsObject[item.id]"></i>
              <span>{{ item.categoryName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="it.path+''" v-for="it in item.slist" :key="it.id" @click="saveNavState(it.path+'')">
              <template slot="title">
                <i :class="iconsObject[it.id]"></i>
                <span>{{ it.title }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--主体布局-->
      <el-main>
        <!--路由占位符-->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>
<script>
import {getAllMenus} from "@/api/common";

export default {
  name: "Home",
  data() {
    return {
      // 左侧菜单
      menuList: [],
      iconsObject: {
        '100': 'iconfont iconguanliyuan',
        '200': 'iconfont iconsport',
        '101': 'iconfont icondenglu',
        '102': 'iconfont iconmima',
        '103': 'iconfont iconsport',
        '104': 'iconfont iconshangpin',
        '201': 'iconfont iconshu',
        '202': 'iconfont iconkaluli',
        '203': 'iconfont iconshiwu',
        '204': 'iconfont icondenglu',
      },
      isCollapse: false,
      // 被激活的连接
      activePath: '',
      queryParams: {
        pageNum: 1,
        pageSize: 10
      }
    }
  },
  // 类似onload
  created() {
    this.getMenuList();
  },
  methods: {
    /* 安全退出*/
    logout() {
      window.sessionStorage.clear();
      /* 退出后路由跳转到登录页*/
      this.$router.push("/login");
    },
    // 获取所有的导航菜单
    async getMenuList() {
      /* 获取后端接口 */
      await getAllMenus(this.queryParams).then(res => {
        this.menuList = res.data.records;
        console.log(this.menuList)
      })
    },
    // 切换菜单折叠与展开，用于控制伸缩
    toggleCollapase() {
      this.isCollapse = !this.isCollapse;
    },
    // 保存二级菜单的路径
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath);// 存放点击的二级菜单
      this.activePath = activePath;// 给点击的菜单添加高亮
    },
  }
};
</script>

<style lang="less" scoped>

.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;// 左右贴边
  padding-left: 0%;// 左边界
  align-items: center;// 水平
  color: #fff;
  font-size: 20px;
  > div { //左侧div加布局
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu{
    border-right: none;// 对其右边框
  }
}
.el-main {
  background-color: #eaedf1;
}
.home-container {
  background-color: #eaedf1;
  //height: 100vh;
  height: 100%;
}
.logo_img {
  width: 20%;
  height: 100%;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  background-color:#4A5064;
  font-size: 10px;
  line-height: 24px;
  color:#fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;// 显示鼠标指针为：小手
}
</style>
